AMENDMENT TO
                              EMPLOYMENT AGREEMENT


This  Amendment is made and entered into effective June 20, 2001, by and between
SONUS CORP., a Yukon Territory, Canada, corporation  ("Corporation"),  and SCOTT
KLEIN ("Executive").

                                    RECITALS

A.    Effective  November 1, 1998,  Corporation  and  Executive  entered into an
      employment agreement (the "Agreement").

B.    Effective June 14, 1999, Executive was appointed by Corporation's Board of
      Directors as President and Chief Operating Officer of Corporation.

C.    Corporation  and Executive  mutually  desire to amend the Agreement as set
      forth in this Amendment.

                                    AMENDMENT

1.    Definitions.  Terms defined in the  Agreement  and not  otherwise  defined
      herein shall have the meanings provided for in the Agreement.

2.    Executive Title and Duties.  Executive will have the title of President of
      Corporation  until at least June 1, 2002, and will be responsible  for all
      operational aspects of the hearing centers owned by Corporation. Executive
      will also have such other executive and managerial duties as Corporation's
      Chief  Executive  Officer may prescribe from time to time.  Executive will
      report directly to Corporation's Chief Executive Officer.

3.    Salary and Bonus.  Executive's  Base Salary is  increased  to $225,000 per
      year  beginning  July 9, 2001. In the event that  Executive is employed by
      Corporation on June 1, 2002,  Executive's Annual Bonus for the fiscal year
      ended July 31, 2002, shall be not less than $25,000.

4.    Termination of Employment. Corporation acknowledges and agrees that by its
      actions in altering certain of Executive's duties following the employment
      of  Daniel  J.  Kohl  as  Chief  Executive  Officer  of  Corporation  (the
      "Restructuring"),  Good  Reason  exists for  Executive  to  terminate  his
      employment  with  Corporation.   Executive  hereby  waives  his  right  to
      terminate his employment based on the  Restructuring;  provided,  however,
      that Executive may terminate his employment  with the  Corporation  (i) at
      any time during the period  beginning on June 1, 2002,  and ending on June
      30, 2002 (the "Separation  Period"),  or (ii) not later than 30 days after
      Daniel J. Kohl ceases to be Chief Executive  Officer of  Corporation,  and
      such  termination  shall be deemed  to be for Good  Reason.  If  Executive
      terminates his employment for Good Reason during the Separation  Period or
      within 30 days after Daniel J. Kohl ceases to be Chief  Executive  Officer
      of  Corporation,  Corporation  will pay  Executive a severance  payment of
      $200,000 instead of a severance  payment in the amount of Executive's Base
      Salary.

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<PAGE>

5.    Additional Stock Options.  Corporation  will grant Executive  nonqualified
      stock option awards for 200,000 shares of Corporation's  common stock (the
      "Option") under  Corporation's  Stock Award Plan (the "Plan").  The Option
      will have the following additional features:

        a.  The  effective  date of the option grant (the "Grant  Date") will be
            the date the Board takes action to grant the Option;

        b.  The option  purchase price per share will be $2.12,  the Fair Market
            Value (as defined in the Plan) on the Grant Date;

        c.  The  Option  will have a term of 10 years,  commencing  on the Grant
            Date;

        d.  The Option will be immediately exercisable as to 70,000 shares;

        e.  The Option will become exercisable as to an additional 10,834 shares
            on the first day of each  fiscal  quarter of  Corporation  beginning
            August 1, 2001;

        f.  The Option  will become  immediately  and fully  exercisable  in the
            event  that,   at  any  time   following  a  Change  in  Control  of
            Corporation,  Executive is  terminated  without  Cause or one of the
            events  described in the  definition  of Good Reason in Section 1 of
            the Agreement occurs;

        g.  The Option will be governed by an Award Agreement (as defined in the
            Plan) as approved by the Board; and

        h.  Vested   Options  will  remain   exercisable   for  one  year  after
            termination  of  employment  or, in the case of  termination  due to
            death or Disability.

4.    Existing  Stock  Options.  With respect to Section 4.3.1 of the Agreement,
      the date by which vested Options must be exercised  following  termination
      of Mr. Klein's  employment by Corporation shall be one year rather than 90
      days. In addition, the following is added to the end of Section 4.3.1:

        "Executive shall be entitled to modifications of his options to purchase
        Corporation's   common   shares   consistent   and   commensurate   with
        modifications   provided  to  other  senior  executives  of  Corporation
        (including  issuance of new  options,  re-pricing  outstanding  options,
        acceleration of vesting periods, etc.)."

5.    Resignation from Board.  Executive will resign from the Board of Directors
      of Corporation effective July 9, 2001.

6.    No Other Amendment.  Except as expressly  provided in this Amendment,  the
      Agreement will continue in full force and effect.


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<PAGE>


CORPORATION:                        SONUS CORP.


                                    By  /s/ Daniel J. Kohl
                                        ----------------------------------
                                        Daniel J. Kohl, Chief Executive Officer


EXECUTIVE:                          /s/ Scott Klein
                                    ----------------------------
                                    SCOTT KLEIN


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